<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <style>
    table,th,td{

        border: 1px solid #333;
    }
    table{

        border-collapse: collapse;
        text-align: center;
        width: 300px;
        line-height: 50px;

    }
    .gap{

        height: 20px;
    }
    
        
        </style>
    <title>Document</title>
</head>
<body>
    <table>
        <thead>
            <tr>
                <th>商城</th><th>手机</th>
            </tr>
        </thead>

        <tbody>
            <tr class="gap"></tr>
            <tr>
                <td>小米</td>
                <td>小米</td>
            </tr>
            <tr class="gap"></tr>
            <tr>
                <td>华为</td>
                <td>华为</td>
                </tr>
        </tbody>
    </table>
</body>
</html>